Question

Find g(f(x)) if
f(x) = x + 1
g(x) = x3

Answer 1

x³ + 3x² + 3x + 1

Explanation:

Substitute x = f(x) into g(x), that is

g(f(x)) = g(x + 1) = (x + 1)³ = x³ + 3x² + 3x + 1

Answer 2

g(f(x)= x^3+3x^2+3x+1

Explanation:

the statement tell us:

f(x) = x + 1

g(x) = x^3

so we have:

g(f(x)=(x + 1)^3

g(f(x)= x^3+3x^2+3x+1